**Persistent cool, cloudy, and showery conditions are suppressing daytime heating in Toronto on August 24, positioning 18–20°C as the leading outcomes.** Official Environment Canada guidance and multiple forecast models (including GFS and local runs) project a high near 20°C under mostly cloudy skies with a 40% chance of showers and southwesterly winds of 20–30 km/h. This follows a similar cool, rainy pattern on August 23 (highs 20–21°C), with the same synoptic setup—cloud cover limiting solar insolation and evaporative cooling from precipitation—expected to keep the daily maximum from exceeding the mid-teens to low-20s Celsius. Historical August averages near 25–26°C highlight the anomaly, driven by an atypical late-summer trough rather than seasonal norms. Recent model consensus and observational trends (persistent westerly flow and high humidity) reinforce the tight clustering around 19°C (market-implied 39.5%), with 18°C (25.5%) and 20°C (24.5%) reflecting minor uncertainties in exact timing of any clearing or shower intensity. Warmer outliers (21°C+) carry low probability absent a rapid shift in cloud cover. Resolution hinges on the official daily maximum recorded at Pearson International Airport or equivalent station data.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Toronto on August 24?
Highest temperature in Toronto on August 24?
19°C 39%
18°C 26%
20°C 26%
21°C 7%
NEW
NEW
Aug 24, 2026
14°C or below
<1%
15°C
1%
16°C
2%
17°C
5%
18°C
26%
19°C
39%
20°C
26%
21°C
7%
22°C
3%
23°C
1%
24°C or higher
1%
19°C 39%
18°C 26%
20°C 26%
21°C 7%
NEW
NEW
Aug 24, 2026
14°C or below
$6 Vol.
<1%
15°C
$18 Vol.
1%
16°C
$61 Vol.
2%
17°C
$248 Vol.
5%
18°C
$596 Vol.
26%
19°C
$324 Vol.
39%
20°C
$498 Vol.
26%
21°C
$520 Vol.
7%
22°C
$76 Vol.
3%
23°C
$15 Vol.
1%
24°C or higher
$32 Vol.
1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 24 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Persistent cool, cloudy, and showery conditions are suppressing daytime heating in Toronto on August 24, positioning 18–20°C as the leading outcomes.** Official Environment Canada guidance and multiple forecast models (including GFS and local runs) project a high near 20°C under mostly cloudy skies with a 40% chance of showers and southwesterly winds of 20–30 km/h. This follows a similar cool, rainy pattern on August 23 (highs 20–21°C), with the same synoptic setup—cloud cover limiting solar insolation and evaporative cooling from precipitation—expected to keep the daily maximum from exceeding the mid-teens to low-20s Celsius.
Historical August averages near 25–26°C highlight the anomaly, driven by an atypical late-summer trough rather than seasonal norms. Recent model consensus and observational trends (persistent westerly flow and high humidity) reinforce the tight clustering around 19°C (market-implied 39.5%), with 18°C (25.5%) and 20°C (24.5%) reflecting minor uncertainties in exact timing of any clearing or shower intensity. Warmer outliers (21°C+) carry low probability absent a rapid shift in cloud cover. Resolution hinges on the official daily maximum recorded at Pearson International Airport or equivalent station data.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 24 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Aug 22, 2026, 8:56 PM ET
Volume
$2,395End Date
Aug 24, 2026Market Opened
Aug 22, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 24 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Persistent cool, cloudy, and showery conditions are suppressing daytime heating in Toronto on August 24, positioning 18–20°C as the leading outcomes.** Official Environment Canada guidance and multiple forecast models (including GFS and local runs) project a high near 20°C under mostly cloudy skies with a 40% chance of showers and southwesterly winds of 20–30 km/h. This follows a similar cool, rainy pattern on August 23 (highs 20–21°C), with the same synoptic setup—cloud cover limiting solar insolation and evaporative cooling from precipitation—expected to keep the daily maximum from exceeding the mid-teens to low-20s Celsius.
Historical August averages near 25–26°C highlight the anomaly, driven by an atypical late-summer trough rather than seasonal norms. Recent model consensus and observational trends (persistent westerly flow and high humidity) reinforce the tight clustering around 19°C (market-implied 39.5%), with 18°C (25.5%) and 20°C (24.5%) reflecting minor uncertainties in exact timing of any clearing or shower intensity. Warmer outliers (21°C+) carry low probability absent a rapid shift in cloud cover. Resolution hinges on the official daily maximum recorded at Pearson International Airport or equivalent station data.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 24 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$2,395End Date
Aug 24, 2026Market Opened
Aug 22, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...**Persistent cool, cloudy, and showery conditions are suppressing daytime heating in Toronto on August 24, positioning 18–20°C as the leading outcomes.** Official Environment Canada guidance and multiple forecast models (including GFS and local runs) project a high near 20°C under mostly cloudy skies with a 40% chance of showers and southwesterly winds of 20–30 km/h. This follows a similar cool, rainy pattern on August 23 (highs 20–21°C), with the same synoptic setup—cloud cover limiting solar insolation and evaporative cooling from precipitation—expected to keep the daily maximum from exceeding the mid-teens to low-20s Celsius. Historical August averages near 25–26°C highlight the anomaly, driven by an atypical late-summer trough rather than seasonal norms. Recent model consensus and observational trends (persistent westerly flow and high humidity) reinforce the tight clustering around 19°C (market-implied 39.5%), with 18°C (25.5%) and 20°C (24.5%) reflecting minor uncertainties in exact timing of any clearing or shower intensity. Warmer outliers (21°C+) carry low probability absent a rapid shift in cloud cover. Resolution hinges on the official daily maximum recorded at Pearson International Airport or equivalent station data.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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